diff --git a/airflow/migrations/versions/b3b105409875_add_root_dag_id_to_dag.py b/airflow/migrations/versions/b3b105409875_add_root_dag_id_to_dag.py
index dc8260a8d65e62..a193f9fed97065 100644
--- a/airflow/migrations/versions/b3b105409875_add_root_dag_id_to_dag.py
+++ b/airflow/migrations/versions/b3b105409875_add_root_dag_id_to_dag.py
@@ -17,9 +17,11 @@
 # under the License.
 
 """add root_dag_id to DAG
+
 Revision ID: b3b105409875
 Revises: d38e04c12aa2
 Create Date: 2019-09-28 23:20:01.744775
+
 """
 
 import sqlalchemy as sa